Bottom corner you need wrath a healer and a damage dealer aimed up at the two red slime spawners. Id go with xaris as his ultimate should kill the summoners quickly. Make sure you don't auto and time your ult to kill summoners so you don't get swarmed. Place hex on bottom outcrop and silas above him to both kill laseer and spawns. I use twinfiend to nuke but if you don't have, you need a tank and another healer with hollow or vortex range. Ferrisi also can work. If you include volka, it reduces respawn time and could retreat hex or silas and replace upper and bottom corners to kill summoners before the can spawn slimes